package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * ClassName: ReportServiceImpl
 * Package: com.sky.service.impl
 * Description:
 *
 * @Author 那啥啥
 * @Create 2024/3/22  14:52
 * @Version 1.0
 */
@Service
@Slf4j
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WorkspaceService workspaceService;
    /**
     * 统计制定时间内的营业额
     * @param begin
     * @param end
     * @return
     */
    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        //计算起始时间

        List<LocalDate> dateList = new ArrayList<>();//存放范围内的日期
        dateList.add(begin);

        while (! begin.equals(end)){
            //指定日期的后一天对应的日期
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        List<Double> turnoverList = new ArrayList<>();
        //根据起始时间查询order的订单

        for (LocalDate localDate : dateList) {
            //查询date日期对应的已完成订单的金额
            LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate, LocalTime.MAX);
            //select sum(amount) from order where oder_time > beginTime and order_time < endTime and status = 5
            Map map = new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);

            Double turnover = orderMapper.sumByMap(map);
            turnover = turnover == null ? 0.0 : turnover;
            turnoverList.add(turnover);

        }


        //封装返回结果
//stringutils的join方法可以添加分隔符 apache lang3包
        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();

    }

    /**
     * 统计用户信息
     * @param begin
     * @param end
     * @return
     */
    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {

        List<LocalDate> dateList = new ArrayList<>();//存放范围内的日期
        dateList.add(begin);

        while (! begin.equals(end)){
            //指定日期的后一天对应的日期
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        List<Integer> totalUserList = new ArrayList<>();
        List<Integer> newUserList = new ArrayList<>();
        //根据日期查询 当天所有用户 在日期内新出现的属于新用户
        //查询所有用户 ，select userid from orders where time  <
        //新增用户， select userid  from user  >?

        for (LocalDate localDate : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate, LocalTime.MAX);
            Map map = new HashMap();
            map.put("end",endTime);

            Integer totalUser = userMapper.countByMap(map);//总用户数量
            map.put("begin",beginTime);
            Integer newUser = userMapper.countByMap(map);//新增用户数量

            totalUserList.add(totalUser);
            newUserList.add(newUser);
        }

//封装vo返回

        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .newUserList(StringUtils.join(newUserList,"," ))
                .totalUserList(StringUtils.join(totalUserList,","))
                .build();



    }

    /**
     * 订单统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();//存放范围内的日期
        dateList.add(begin);

        while (! begin.equals(end)){
            //指定日期的后一天对应的日期
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //订单总的需求

        Integer totalCount = 0;
        Integer totalValid = 0;

        ArrayList<Integer> TotalOrder = new ArrayList<>();
        ArrayList<Integer> validOrder = new ArrayList<>();
        //每日订单每日有效订单

        for (LocalDate localDate : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate, LocalTime.MAX);
            Map map = new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            Integer totalOrder1 =  orderMapper.getByDate(beginTime,endTime);
            Integer validOrder1 = orderMapper.getByDateAndStatus(beginTime,endTime,Orders.COMPLETED);
            totalOrder1 = totalOrder1 == null ? 0 : totalOrder1;
            validOrder1 = validOrder1 == null ? 0 : validOrder1;

            totalCount+=totalOrder1;
            totalValid+=validOrder1;
            TotalOrder.add(totalOrder1);
            validOrder.add(validOrder1);
        }
        //计算订单完成率
        Double orderCR = 0.0;
        if (totalCount != 0) {

            orderCR = totalValid.doubleValue() / totalCount.doubleValue();
        }
         return OrderReportVO.builder()
                 .totalOrderCount(totalCount)
                 .validOrderCount(totalValid)
                 .orderCompletionRate(orderCR)
                 .dateList(StringUtils.join(dateList,","))
                 .orderCountList(StringUtils.join(TotalOrder,","))
                 .validOrderCountList(StringUtils.join(validOrder,","))
                 .build();
    }

    /**
     * 销量top10
     * @param begin
     * @param end
     * @return
     */
    @Override
    public SalesTop10ReportVO getTop10Statistics(LocalDate begin, LocalDate end) {

        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
       List<GoodsSalesDTO> goodsSalesDTOList =  orderMapper.getTop10(beginTime,endTime);

       String nameList =
               StringUtils.join(goodsSalesDTOList.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList()),",");
       String numberList =
               StringUtils.join(goodsSalesDTOList.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList()),",");
        return SalesTop10ReportVO
                .builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }

    /**导出近30天的运营数据报表
     * @param response
     **/
    @Override
    public void exportBusinessData(HttpServletResponse response) {
        LocalDate begin = LocalDate.now().minusDays(30);
        LocalDate end = LocalDate.now().minusDays(1);
        //查询概览运营数据，提供给Excel模板文件
        BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(begin,LocalTime.MIN), LocalDateTime.of(end, LocalTime.MAX));
        InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        try {
            //基于提供好的模板文件创建一个新的Excel表格对象
            XSSFWorkbook excel = new XSSFWorkbook(inputStream);
            //获得Excel文件中的一个Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");

            sheet.getRow(1).getCell(1).setCellValue(begin + "至" + end);
            //获得第4行
            XSSFRow row = sheet.getRow(3);
            //获取单元格
            row.getCell(2).setCellValue(businessData.getTurnover());
            row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessData.getNewUsers());
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessData.getValidOrderCount());
            row.getCell(4).setCellValue(businessData.getUnitPrice());
            for (int i = 0; i < 30; i++) {
                LocalDate date = begin.plusDays(i);
                //准备明细数据
                businessData = workspaceService.getBusinessData(LocalDateTime.of(date,LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }
            //通过输出流将文件下载到客户端浏览器中,response用于获取输出流
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);
            //关闭资源
            out.flush();
            out.close();
            excel.close();

        }catch (IOException e){
            e.printStackTrace();
        }
    }
}
